Počet záznamů: 1

The effect of powder characteristics on pressure sensitivity of powder injection moulding compounds

  1. 1.
    0351791 - UH-J 2011 RIV CH eng J - Článek v odborném periodiku
    Hausnerová, B. - Sedláček, T. - Filip, Petr - Sáha, P.
    The effect of powder characteristics on pressure sensitivity of powder injection moulding compounds.
    Powder Technology. Roč. 206, č. 3 (2011), s. 209-213 ISSN 0032-5910
    Grant CEP: GA ČR GA103/08/1307
    Výzkumný záměr: CEZ:AV0Z20600510
    Klíčová slova: pressure sensitivity coefficients * modified capillary rheometer * particle size distribution * PIM technology * carbide powder * binder
    Kód oboru RIV: BK - Mechanika tekutin
    Impakt faktor: 2.080, rok: 2011

    Pressure effect on the rheological behaviour of powder–polymer compounds intended for powder injection moulding was determined. A single-piston capillary rheometer modified by addition of a second chamber with a restricting needle valve generating backpressure increasing the pressure in the melted material during the flow through the die was employed to determine pressure sensitivity coefficients. The results obtained for three compounds varying in the characteristics of powders used confirmed that compounds at the loading level close to the maximum packing are more sensitive to pressure than polymer binder. It is shown that pressure sensitivity coefficients of these materials are strongly dependent on powder characteristics - particle size and particle size distribution. The highest coefficient (32.9 GPa−1) was found for compound containing broad particle size distributed powder having a perceptible portion of small particles.
    Trvalý link: http://hdl.handle.net/11104/0191465
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